Puncture device sealing membrane containing multi-dimensional floating wrinkles

A technology of sealing film and puncture device, which is applied in the fields of puncture needle, puncture needle, medical science, etc., can solve the problems of increased production cost, complicated mold and high defect rate

Active Publication Date: 2016-11-23
5R MED TECH CHENGDU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the deformation force of the "concentric rings" is usually reduced by reducing the wall thickness of the floating folds. The wall thickness of the folds in the prior art is usually 0.15-0.25mm, which leads to the mold accuracy of the product High requirements, complex molds, and high defect rate in the manufacturing process, which increases production costs
[0009] So far, there is no more effective method of reducing the radial tension when the floating part "concentric ring" is deformed

Method used

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  • Puncture device sealing membrane containing multi-dimensional floating wrinkles
  • Puncture device sealing membrane containing multi-dimensional floating wrinkles
  • Puncture device sealing membrane containing multi-dimensional floating wrinkles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] The cross-sectional shape of the radial folds 140 in Embodiment 1 is approximately U-shaped; while the cross-sectional shape of the radial folds 440 in Embodiment 4 is approximately V-shaped; Embodiment 4 and Embodiment 1 reduce the outer The radial pulling force when the floating part moves radially to the extreme position has similar effect.

[0061] It is easy for those skilled in the art to think that a reasonable rounded corner transition can avoid stress concentration or make deformation of certain regions easier. Due to the small size of the sealing film, especially the area near the sealing lip, such a small size, the shape of the sealing film looks very different with different chamfers. In order to clearly show the geometric relationship between elements, the examples described in the present invention are usually figures after the rounded corners are removed.

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PUM

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Abstract

The invention relates to a puncture device sealing membrane containing multi-dimensional floating wrinkles. The puncture device sealing membrane comprises a near-end opening, a far-end hole, an outside sealing member extending from the near-end opening to the far-end hole and an inside sealing member extending from the far-end hole to the near-end opening. The outside sealing member and the inside sealing member extend and intersect to form a flange. The far-end hole is formed by a sealing lip and used for containing an inserted instrument and forming sealing. The outside sealing member at least contains one radial wrinkle, each radial wrinkle at least contains two annular wrinkle walls, and at least one annular wrinkle wall contains multiple tangential wrinkles.

Description

technical field [0001] The invention relates to a minimally invasive surgical instrument, in particular to a sealing structure of a trocar. Background technique [0002] A trocar is a surgical instrument used to establish an artificial channel into a body cavity in minimally invasive surgery (especially hard tube endoscopic surgery). Usually consists of a cannula assembly and a puncture needle. Its general clinical use method is: first cut a small opening on the patient's skin, then pass the puncture needle through the cannula assembly, and then penetrate the abdominal wall through the skin opening and enter the body cavity together. Once in the body cavity, the needle is removed, leaving the cannula assembly as a channel for the instrument to enter and exit the body cavity. [0003] In rigid endoscopic surgery, it is usually necessary to establish and maintain a stable pneumoperitoneum to obtain sufficient operating space. Cannula assemblies usually consist of a cannula,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/34A61B17/00
CPCA61B17/00234A61B17/3417A61B17/3462A61B2017/3445A61B2017/3419A61B17/00A61B17/34A61B17/3421A61B2017/3464A61B2017/00477A61B2017/00862
Inventor 朱莫恕
Owner 5R MED TECH CHENGDU CO LTD
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